package com.example.yls.demoa;

import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity implements IOnUpdatListener {
private TextView txtTime;
private MyReceiver receiver;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        receiver = new MyReceiver(MainActivity.this);
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_TIME_CHANGED);
        filter.addAction(Intent.ACTION_TIME_TICK);
        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
        registerReceiver(receiver,filter);

        txtTime=findViewById(R.id.txt_time);
        updateTime();

    }

    @Override
    public void updateTime() {
        Calendar calendar = Calendar.getInstance();
        int hour = calendar.get(Calendar.HOUR);
        int min = calendar.get(Calendar.MINUTE);
        txtTime.setText(hour+" : "+min);
    }

    @Override
    protected void onDestroy() {
        unregisterReceiver(receiver);
        super.onDestroy();
    }
}
